Producer Kevin Feige first publicly mentioned Guardians of the Galaxy as a potential film in 2010, and Marvel Studios announced that the film was in active development at the San Diego Comic-Con International in July 2012. Gunn was hired to write and direct the film that September. In February 2013, Pratt was hired to play Peter Quill / Star-Lord, and the supporting cast was filled out over the next several months. Filming began in July 2013 at Shepperton Studios, England with filming continuing in London before wrapping up in October 2013. Post-production completed on July 7, 2014.

Guardians of the Galaxy premiered in Hollywood on July 21, 2014. It was released in theaters August 1, 2014 in the United States, and was released in 3D and IMAX 3D. A sequel has been announced and is scheduled to be released on July 28, 2017.